Boiler for heating buildings



(Modem E. A. GAY.

BOILER FOR HEATING BUILDINGS.

No. 273,718. Patented Mar. 13,1883.

llNrre STATES PATENT @rrrcn.

EDGAR A. GAY, OF BUFFALO, NEXV YORK.

BOILER FOR HEATING BUILDINGS.

SPECIFICATION forming part of Letters Patent No. 278,718, dated March13, 1883.

(llodelJ To all whom it may concern:

Be it known that I, EDGAR A. GAY, a citizen of the United States,residing at Buffalo, in the county of Erie and State of New York, havemade certain Improvements in Boilers for Heating Buildings, &c., ofwhich the fol lowing is a specification.

The object of this invention is to get a simple and comparativelyinexpensive device that will present a large heating-surface for theaction of the fire on the water chambers and spaces in connectiontherewith; and the invention consists in the construction andarrangement oftheboiler,ashereinafterfully described.

In the drawings, Figure l is a front vertical section through the centerof the entire device. Fig. 2 is a. side vertical section through line of:0, Fig. 1. Fig. 3 is a horizontal plan in crosssection through line of0, Figs. 1 and 2.

The boiler is ofmetal, either cast or wrought, and is in four sectionsor parts.

A A represent 'the outside walls or shell which incloses the wholedevice, excepting the front.

B B is an inner shell, jointed to the outside shell, A, at the front,and extending to within a few inches of shell A at back, thus giving awater-space, a a a, at sides, top, and bottom of the device. The top ofthis shell is heavily corrugated or waved, as at B, so as to givegreater fire-surface to the action of heat on the water therein. Shell 0is jointed to B at the back, (see Figs. 2 and 3,) both sides offire-pot,

and extends entirely to the front, or may formv part of the front of theboiler. Between shells B and C a large space, I) b, is left at sides,top and bottom, forming the indirect flue, that at the top making theheating-chamber C. An exit to this is provided at D, and a damperprovided in the plate E, by use of which the products of combustion mayescape directly from the fire-chamber 0 through opening D,

Y (see Fig. 1,) or else be made to traverse the entire length of theindirect flue b 1) before leaving the boiler. Shell 0 is flanged at thetop, leaving a circular opening into the firepot or coal-magazine, whichis made by shell F, and to which shell 0 is jointed. This gives aconnection and escape of fire, 850., into the chamber 0. A lowerhorizontal opening is made to get at the ash-pit.

G is the grate, set in bar I at a suitable distance above the bottom ofash-pit. The grate may be square as well as round. Between the walls ofthe circular shell F and shell U is left a water-space, d (1, Figs. 1and 2, making a large and valuable water-heating space at front, sides,and bottom, and with the shell A at back. (See Figs. 2 and 3.) Theopenings left in front of the boiler by the heat ing-chamber,return-flue, and ash-pit are covered by removable front pieces, P l I,(having proper doors for the heating-chamber and ash-pit,) for cleaningthe return-tine. These pieces P are all lined with non-conducting cemcutor other fire-proof material to retain the heat inside the boiler.

Instead of the joints to unite shells B and 0, they may perhaps be casttogether, it found desirable; but I prefer thejoints.

The working of this heating-boiler is as follows: The water-spaces arekept supplied with water through the side opening, J, by suitableconnections therewith. After the tire is well under way the damper inplate E is closed, forcing the draft through indirect flue I) b I). Allthe heat from the ash-pit is absorbed by water-space d, and at no pointcan there be any wasteful radiation of heat before it has hadopportunity to communicate with the water. The construction of the wholeis such that the various shells are free to expand from their fixedpoints, so as to obviate danger of cracking the plates by any unequalexpansion. The surfaces forming the tire-chamber and flue may becorrugated or not, as desired. The top opening, H, connects with theheating-pipes.

The advantages ofmy construction are, great compactness, the wholeboiler, ash-pit, and fines being contained in one inclosure, occupyingbut little space; surrounding the ashpit by a water-space, which absorbsheat from the pit and also from the line; the arrangement of flue b andfire-chamber 0, making them accessible for inspection or cleaning by theremovable pieces P P; also, the application of the downdraft principle,and without using fines or tubes. andwhich are liable to become foul andchoked.

The shell B may be of one continuous piece or made of several piecesjoined together.

I claim 1. A boiler provided with the indirect flue I), passing down theside thereof, crossing under the water-space d, surroundingthe ash-pit,ing the ash-pit, and extending up to the exit and extcndin g up theopposite sideof the boiler D, and provided with a damper in the plate E,to'the exit D, said flue being provided with a substantially as hereinset forth.

damper to give direct or indirect flue draft, In witness whereof I havehereunto signed 5 substantially as set forth. rny'name in the presenceof two subscribing 15 2. In a boiler, the combination of the outerWitnesses, n casing, A, and inner shell, B, provided with an EDGAR A.GAY. interlying water-space, a a, and having an in- Witnesses: directflue,'b, passing down the side of the boiler J. R. DRAKE, 10 andcrossing under the Water-space d, surround- T. H. PARSONS.

